Question

Va rog ajutatimaaa dau coroanaaa​

Answer 1

Răspuns:

Explicație pas cu pas:

CD/AD =3/4  ;     CD=3k  ;  AD=4k

AC²=CD²+AD²=(3k)² +(4k)²=9k²+16k²=25k²

40²=25k²

k²=1600/25

k=40/5 =8

AD=4k =4×8 =32 cm

CD=3k=3×8 =24 cm

AC²=CD*BC

40²=24BC

1600=24BC

BC=1600/24=66.66 cm

BD=BC-CD=66.66-24=42.66 cm

AB²=BC*BD

AB²=66.66*42.66=2743.71

AB=√2743.71 =53.32 cm

Pabcd =32.32+66.66+40 =106.66 cm